By M. Karimi, Y. Labrador
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Extra resources for Advances in Satellite Communications
We set L0 = 100 m and l0 = 1 mm. Table 1 shows parameters used in analysis. 5 Modulus of complex degree of coherence Using the second moment of received waves, we examine the loss of spatial coherence of received waves on the aperture of a receiving antenna by the modulus of the complex degree of coherence (DOC) (Andrews & Phillips, 2005) deﬁned by DOC(ρ, z) = M11 (0, ρ, z) , [ M11 (ρ/2, 0, z) M11 (−ρ/2, 0, z)]1/2 (30) where ρ = |ρ| is the separation distance between received wave ﬁelds at two points on the aperture as shown in Fig.
5. The system noise temperature Ts is obtained by Ts = N0 , kB (62) where k B denotes Boltzmann’s Constant. Thus, the G/T of the receiver system can be described by (kae )2 Gr k G/T = . (63) = B · Ts N0 2 On the other hand, using (19) and (34), Eb /N0 in free space is obtained by Tb A a2e T A 2 k2 w02 · = b · ·a · , 2 k B Ts Z0 w k B Ts Z0 e 4z2L P (z ) · Tb T A a2e Eb = in L = b · 2 N0 N0 N0 Z0 w + a2e (64) 1. Using the EIRP and the G/T obtained by (60) and (63) where it is assumed that ae /w respectively, Eb /N0 in free space can be expressed by Eb (kae )2 T A 1 T 1 Gr = b · · 2(kw0 )2 · · = b · Pin · Gt · · N0 k B Z0 2Ts kB (2kz L )2 (2kz L )2 Ts T 1 = b · EIRP · · G/T.
7–13. , Fujisaki, K. & Tateiba, M. (2009a). Average bit error rate for satellite downlink communications in Ka-band under atmospheric turbulence given by Gaussian model, Proceedings of 2009 Asia-Paciﬁc Microwave Conference (APMC 2009), Singapore. , Fujisaki, K. & Tateiba, M. (2009b). Average bit error rate for satellite uplink communications in Ka-band under atmospheric turbulence given by Gaussian model, Proceedings of the 15th Asia-Paciﬁc Conference on Communications (APCC 2009), Shanghai, China, pp.